74 lines
2.2 KiB
C
74 lines
2.2 KiB
C
#ifndef _ASM_LGUEST_USER
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#define _ASM_LGUEST_USER
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/* Everything the "lguest" userspace program needs to know. */
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/* They can register up to 32 arrays of lguest_dma. */
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#define LGUEST_MAX_DMA 32
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/* At most we can dma 16 lguest_dma in one op. */
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#define LGUEST_MAX_DMA_SECTIONS 16
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/* How many devices? Assume each one wants up to two dma arrays per device. */
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#define LGUEST_MAX_DEVICES (LGUEST_MAX_DMA/2)
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struct lguest_dma
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{
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/* 0 if free to be used, filled by hypervisor. */
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u32 used_len;
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unsigned long addr[LGUEST_MAX_DMA_SECTIONS];
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u16 len[LGUEST_MAX_DMA_SECTIONS];
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};
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struct lguest_block_page
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{
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/* 0 is a read, 1 is a write. */
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int type;
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u32 sector; /* Offset in device = sector * 512. */
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u32 bytes; /* Length expected to be read/written in bytes */
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/* 0 = pending, 1 = done, 2 = done, error */
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int result;
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u32 num_sectors; /* Disk length = num_sectors * 512 */
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};
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/* There is a shared page of these. */
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struct lguest_net
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{
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/* Simply the mac address (with multicast bit meaning promisc). */
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unsigned char mac[6];
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};
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/* Where the Host expects the Guest to SEND_DMA console output to. */
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#define LGUEST_CONSOLE_DMA_KEY 0
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/* We have a page of these descriptors in the lguest_device page. */
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struct lguest_device_desc {
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u16 type;
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#define LGUEST_DEVICE_T_CONSOLE 1
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#define LGUEST_DEVICE_T_NET 2
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#define LGUEST_DEVICE_T_BLOCK 3
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u16 features;
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#define LGUEST_NET_F_NOCSUM 0x4000 /* Don't bother checksumming */
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#define LGUEST_DEVICE_F_RANDOMNESS 0x8000 /* IRQ is fairly random */
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u16 status;
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/* 256 and above are device specific. */
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#define LGUEST_DEVICE_S_ACKNOWLEDGE 1 /* We have seen device. */
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#define LGUEST_DEVICE_S_DRIVER 2 /* We have found a driver */
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#define LGUEST_DEVICE_S_DRIVER_OK 4 /* Driver says OK! */
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#define LGUEST_DEVICE_S_REMOVED 8 /* Device has gone away. */
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#define LGUEST_DEVICE_S_REMOVED_ACK 16 /* Driver has been told. */
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#define LGUEST_DEVICE_S_FAILED 128 /* Something actually failed */
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u16 num_pages;
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u32 pfn;
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};
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/* Write command first word is a request. */
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enum lguest_req
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{
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LHREQ_INITIALIZE, /* + pfnlimit, pgdir, start, pageoffset */
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LHREQ_GETDMA, /* + addr (returns &lguest_dma, irq in ->used_len) */
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LHREQ_IRQ, /* + irq */
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LHREQ_BREAK, /* + on/off flag (on blocks until someone does off) */
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};
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#endif /* _ASM_LGUEST_USER */
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